You may be thinking of "snap one off"?

你该说我是行动迅速
-"Snap it off"? - Or"Pop"? Like,"Pop one off"?

-"行动迅速"吗 -要不"速战速决"
I don't want anything to snap and pop when I'm masturbating.

我在手淫时可不想快速也不想停顿
If it cracks a little bit, fine.

如果射的早了点没关系
"Fine"?

"没关系"吗
The point is, you're gonna chafe yourself cracking off as much as you do.

关键是你能让自己尽可能多地爽快几次
All right, so, we...

算了那我们...
Do you need help across the street?

你过马路需要帮忙吗
Okay. Don't pull, though.

行别拖我就行
He goes crazy. He's furious with his penis or something.

他变得不可理喻他对自己的老二不满意
Angry.

很生气
Angry masturbation, which is dangerous.

生手淫的气这很危险